SS Cygni in quiescence

Details SS Cygni in quiescence SS Cygni in quiescence

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.179h&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 179-181 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

4

Cataclysmic Variables, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, White Dwarf Stars, Lyman Alpha Radiation, Ultraviolet Spectroscopy

Scientific paper

Low reslution IUE spectra of SS Cygni obtained near quiescence show a strong absorption feature near 1225A. If this feature is interpreted as the red wing of the Lyman alpha absorption in the spectrum of the white dwarf component, then the star has an effective temperature of 34,000 + or - 5000 K. This information is used to derive limits on the distance. Observations obtained in outburst are used to determine an E(B-V) estimate of 0.04 + or - 0.02. While these observations are consistent with the detection of the white dwarf primary they also show that the disk itself can produce Lyman alpha absorption resembling that of a white dwarf and that the existence of the feature is not proof that the white dwarf is detected.

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